As per IS 800: 2007, in the design of beams/plate girders, when the web of a member acting alone is inadequate, different types of stiffeners are provided. Match the type of stiffeners provided in List 1 with the requirement to be satisfied by them in List 2.

As per IS 800: 2007, in the design of beams/plate girders, when the web of a member acting alone is inadequate, different types of stiffeners are provided. Match the type of stiffeners provided in List 1 with the requirement to be satisfied by them in List 2. (Use the Code in the lists for matching)
List-I List-II
A. Intermediate transverse web stiffener 1. Provided local reinforcement to web under shear and bearing
B. Load carrying stiffener 2. Improve the buckling strength of a slender web due to shear
C. Bearing stiffener 3. Prevent local buckling of web due to concentrated loading
D. Diagonal stiffener 4. Prevent local crushing of web due to concentrated loading

Right Answer is:

B-2, C-3, D-4, E-1

SOLUTION

Transverse stiffeners are generally required to ensure the satisfactory performance of the web panels of slender plate girders. The three most important types of stiffeners are as follows.

As per section 8.7.1.1, IS 800: 2007,

Intermediate transverse stiffener:- These are provided at intermittent locations to improve the buckling strength of the slender web. ‘Web buckling occurs due to the diagonal compression of shear. The transverse web stiffeners not subjected to external load are so proportioned that the moment of inertia of the stiffener cross-section about the axis parallel to the web is not less than the specified values as per Clause 8.7.2.4, p. 66 of IS 800: 2007.

Load-carrying stiffeners are provided to prevent local buckling of the web due to concentrated loads or reactions applied through the flange. They should be positioned wherever such actions occur if the resistance of the unstiffened web would otherwise be exceeded.

Bearing stiffeners are provided to prevent local crushing of the web due to concentrated loads or reactions applied through the flange. If such actions do not exceed the buckling resistance of the web, then the load-carrying stiffeners of section 17.4.7.3 are not needed. However, the local bearing resistance may still be exceeded.

Diagonal Stiffeners provide local reinforcement of web in shear and bearing.

Hence the correct List is

List-I List-II
A. Intermediate transverse web stiffener 1. Provided local reinforcement to web under shear and bearing
B. Load carrying stiffener 2. Improve the buckling strength of a slender web due to shear
C. Bearing stiffener 3. Prevent local buckling of web due to concentrated loading
D. Diagonal stiffener 4. Prevent local crushing of web due to concentrated loading
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